Northern Mariana Islands CIA Map The Northern Mariana Islands are a commonwealth of the United States found in the Pacific Ocean. Around 50,000 people live there. Its capital city is Saipan. Other helpful pages on WorldAtlas Capital Cities of All European Nations Country Flags List Countries Listed by Continent Map and Details of all 7 Continents Trending on WorldAtlas The Most Dangerous Cities in the World The 10 Smallest Countries In The World The Largest Countries in the World The 10 Largest Cities in the World The Seven Wonders of the World The Most Popular Sports in the World The 10 Smallest Countries in Europe 29 Largest Armies In The World What is the Difference Between Republicans and Democrats? This page was last updated on November 17, 2017.